What is acceptable range of pressure in vacuum bagging resin infusion?

I need to know name of standards that provide allowed vaccum pressure in resin infusion.

02 March 2019 3,977 1 View

How to determine the delamination critical stress in sandwich panel with laminates skins upper and bottom?

I study the delamination of laminates upper and bottom skins of honeycomb composite structure simple supported from two sides and under bending stress. I consider the developed tension on the...

01 February 2019 4,107 2 View

What are the best mesh quality criterion for inspection element quality?

I know about mesh density, skewness, wrap angles, and aspect ratio. Per literature, aspect ratio is a quick tool to define quality of mesh. Is there a rule of thumb for acceptable values of...

01 February 2019 2,459 5 View

What is impact of elements overlapping on the accuracy of solutions?

In FE some elements are overlapping. I read a paper says thst such overlapping causes higher in plane stiffness only. I wonder does the impact on accuracy of solutions very big?

01 February 2019 9,872 7 View

What are the important features in acoustics emission signals?

I do some experiments in using AE method to detect events. I can plot a lot of figures such as hits, signal strength, waveform, counts, events so on. Which data shall I concentrate on? A little...

31 December 2018 6,615 10 View

How can I start implementing method of moving asymptotes?

I'm a little bit confused in regard of implementing MMA method. Should I transform the objective function into a Taylor series in order to use this method? Most of tutorials explain the...

31 December 2018 7,873 4 View

How can I get rid of elements overlapping in a knot for a finite element model??

I have developed a honeycomb sandwiched structure in Salome platform, meshed with netgen 2D, then calculated the compression stresses on it using Calculix open source FE. I tried to optimise the...

11 December 2018 921 1 View

What are the main considerations in injection mold designing and calculations?

I'd like to know the main parameters that should be considered in designing of injection mold. Also, I need to know a source for standardized calculations.

01 February 2018 616 4 View

How can I start learning Calculix coding?

05 June 2017 7,774 2 View

What are the sources of error in using an APDL Ansys code on two different versions with two nonsense solutions?

We have a code for a benchmark problem. We used this code in Ansys 14 and in Ansys 17. However, we get two different nonsense solutions. Further, we repeated running the code on Ansys 14 and it...

03 April 2017 1,547 3 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View